Rhodamine B-grafted chitosan adsorbent and preparation and application thereof

The invention discloses a rhodamine B-grafted chitosan adsorbent and preparation and application thereof, and belongs to the field of adsorbing material preparation technologies. Preparation of the adsorbent comprises the steps that rhodamine B reacts with hydrazine hydrate to prepare rhodamine B hydrazide; rhodamine B hydrazide is grafted to chitosan by taking glyoxal as a cross-linking agent to obtain the adsorbent. According to the rhodamine B-grafted chitosan adsorbent, through the adsorptivity of chitosan and rhodamine B, bonding is firm, the property is stable, the selectivity is good, and the enrichment factor is large. The adsorbent can be used for adsorption and detection of mercury ions in an environmental water sample. 本发明公开了种罗丹明B接枝壳聚糖吸附剂及其制备和应用，属于吸附材料制备工艺领域。先将罗丹明B和水合肼反应制得罗丹明B酰肼；然后以乙二醛为交联剂，将罗丹明B酰肼接枝到壳聚糖上得到吸附剂；本发明提供的罗丹明B接枝壳聚糖吸附剂，其利用壳聚糖与罗丹明B的吸附性，键合牢固、性质稳定，选择性好，富集倍数较大。该吸附剂可用于环境水样中汞离子的吸附与检测。